Screening-machine.



PATENTED MAR. 14, 1905.

J. OLAUGHLIN. SCREENING MACHINE.

APPLIOATION FILED MAR. 17, 1904.

3 SHEETS-SHEET 1.

PATENTED MAR. 14, 1905.

J. OLAUGHLIN. SGREENING MACHINE.

APPLICATION FILED MAB,.17, 1904.

3 SHEBTSSHEET 2.

PATENTED MAR. 14, 1905.

J. OLAUGH'LIN.-

SCREENING MACHINE.

APPLICATION FILED MAR. 17, 1904.

3 SHEETS-SHEET 8.

Patented March 14, 1905.

PATENT OFFICE.

JOHN OLAUGHLIN, OF RACINE, WISCONSIN.

' I I SCREENING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 784,877, dated March 14, 1905. Application filed March 1'7, 1904. Serial No. 198,541.

To all whom it may concern:

Be it known that 1, JOHN OLAUGHLIN, a citizen of the United States, and a resident: of Racine, in the county of Racine and State of Wisconsin, have in vented certain new and useful I m provements in Screening-Machines; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention has for its object to facilitate the grading of various materials, especially crushed stone; and it consists in a simple eco' Fig. 5 a plan view of a fragment of another portion of said machine.

Referring by letter to the drawings, A indicates each of a series of posts supporting a rectangular main frame, and in hinge connection with sides B of this frame are the corresponding sides C of a rectangularauxiliary frame havingits front end rested on an elevating-screw D, for which a bearing 5 is provided in the adjacent end E of the main frame, central of the same.

The ends of the auxiliary frame are provided with bearings for parallel shafts F Gr, the first of which is driven by any suitable means and has its motion communicated to the other by suitable gear, link-belt and sprocket gear being herein shown. Fast on each of the shafts are wheels H adjacent to the ends of the auxiliary frame, and in frietional contact with these wheels are outer flanges c of heads I, pertaining to what is hereinafter termed the screen-drum of the machine, the drive of this drum ,being positive at both ends and its inclination, withthat of said auxiliary frame, regulated by means of the elevating-screw aforesaid.

Bolted or otherwise fastened at their ends to an end and a cross-piece J of the auxiliary frame are parallel bars K, of angle-iron or other suitable material, and supported on these bars are parallel troughs L M N, concentric to the screen-drum. These troughs are respectively provided with central depending outlet-chutes, and the chutes CZ of the troughs L N arefor the most part at angles in opposite directions from the vertical chute e of the trough M, as is best shown in Fig. 1.

The heads I of the screen-drum are provided with outwardly-flanged central openings, and bolted or otherwise suitably fastened to the flanges g of said openings is a cylindrical screen P, open at both ends. The drum-heads are also provided with radial slots h, in which bolts a are adjustably held by means of nuts "run thereon, and supported on the boltheads are cylindrical screens Q R S between said drum-heads, concentric with each other and the center screen P aforesaid. The center screen has the coarsest mesh, and the mesh of the other screens is gradually finer, thatof the outer screen being finest.

While the screens are shown between the drum-heads concentric with each other and the center screen, the number may be more or less than that stated, and the intervals between screens-may be also more or less, the radial adjustment of the bolts 27 in series being made to accord with the diameter of the screens for which they serve as supports.

At the discharge end of the drum a partition T is interposed between the screens Q, R, and outlets m a in these screens, between the partition and adjacent drum-head, register with an outlet 3) in the outer screen a back of another partition, U, arranged between the screens R S, parallel to another partition, V, between the same screens. The screen R is provided with an outlet 9 in resister with an outlet 0 in the screen S, these outlets being between the parallel partitions, and said screen S is provided with another outlet, 8, back of the partition V, the aforesaid arrangement of partitions and screen-outlets being clearly shown in Fig. 1.

The material to be separated by screening is fed into the center screen P at the head end of the revolving drum, and the coarsest material is delivered from said screen at the.

other end of said drum, the latter being suitably inclined to permit automatic travel of said material longitudinally of the aforesaid screen. The material caught by the screen Q, finds its way through the screen-outlets m n p, back of the drum-partition T, into the trough L, the material caught by the screen R escapes through the screen-outlets q 9', between drum-partitions U V, into the trough M, and the material caught in screen S is discharged through its outlet s, back of said partition V, into the trough N, the various grades of the aforesaid material from the screens Q, R S being delivered from said troughs through the depending chutes (Z c f of same.

The center screen is provided with an inner annular flange t, and this flange tends to prevent back overflow of material fed to the screen.

End thrust of the screen-drum is prevented by means of an antifriction -wheel W, for which the auxiliary frame of the machine is provided with a stationary bearing, this wheel being arranged to abut the flange c of the drum-head at the discharge end of said machine.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A screening-machine comprising a frame adjustable to various angles, a rotary drum adjustable with the frame and consisting of'a series of concentric screens of different mesh, heads through which the central screen is open at both ends but which close the ends of the other screens, and partitions back of the head at the discharge end of the drum between certain of the screens adjacent to outlets provided in the same; troughs stationary on said frame concentric with said drum under the partition end of same to receive material discharged through the outlets of the screens between the drum-heads, and chutes depending from the troughs.

2. A screening-machine comprising a frame adjustable to various angles, a rotary drum adjustable with the frame, and consisting of radially-slotted heads having central openings, a cylindrical screen open at both ends and set in the head slots, other cylindrical screens supported at their ends on the bolt-heads concentric to each other and the screen aforesaid between the drum-heads, and partitions back of the drum-head at the discharge end of the machine between certain of the screens adjacent to outlets provided in the same; troughs stationary on said frame concentric with said drum under the partitioned end of same to receive material discharged through the outlets of the screens between the drum-heads, and chutes depending from the troughs.

3. A screening-machine comprising a suitably-pitched rotary drum consisting of a central cylindrical screen of coarse mesh open at both ends, heads having central openings engaged by said screen, other screens of difierent mesh finer than that of the one aforesaid concentric with the same between the drufnheads by which they are closed at their ends, and partitions back of the heads at the discharge end of the machine between the screens of finer mesh adjacent to outlets in the same; stationary troughs under the partitioned end of the drum concentric with the same to receive material discharged through outlets of the screens between the drum-heads, and I chutes depending from the troughs.

4:. A screening-machine comprising a suitably-pitched rotary drum consisting of a central cylindrical screen of coarse mesh open at both ends but having its feed end provided with an inner annular flange, heads having central openings engaged by said screen, other screens of different mesh finer than that of the one aforesaid concentric with the same between the d ru m-heads by which they are closed at their ends, and partitions back of the head at the discharge end of the machine between the screens of finer mesh adjacent to outlets in the same; stationary troughs under the partitioned end of the drum concentric with the same to receive material discharged through outlets of the screens between the drum-heads, and chutes depending from the troughs.

5. A screening-machine comprising a main frame an auxiliary frame adjustable on the main one to various angles, a drum having rotary support on the auxiliary frame and consisting of a series of concentric screens of different mesh, heads through which the central one of the screens is open at both ends but which close the ends of the other screens, and partitions back of the head at the discharge end of the machine between certain of the screens adjacent to outlets in the same; troughs stationary on the auxiliary frame concentric with the drum under the partitioned end of same to receive material discharged through the outlets of the screens between the drumheads, and chutes depending from the troughs.

In testimony that I claim the foregoing I have hereunto set my hand, at Milwaukee, in the county of Milwaukee and State of l/ViS- consin, in the presence of two witnesses.

JOHN OLAUGHLIN. l Vitnesses;

H. G. UNDERWOOD, R. J. BARSCH. 

